Furnace.



' No. 680,653. 'Patented Aug. la, |901;

' G. S.,GALLAGHER.

FuRNAcE.

(Application led Jan. 21, 1901.) um Model.) 2 sheets-sheet l.

No. 680,653. Pate'ntedAug. x3, 190|. a. s. GALLAGHER.

FURNCE.

(Application led Jan. 21, 1901.)

2 Sheets-Sheet 2.

(No Model.)

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UNITED STATES PATENT OFFICE.

GEORGE S. GALLAGHER, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGN- MENTS, TO LEAVITT J. HUNT, OF SAME PLACE.

FURNACE.

4S'PECIFICATIOBT 'forming part of Letters Patent No. 680,653, dated August 13, 1901,.

Application filed January 21, 1901. Serial No. 44,063. (No model.)

T ctZZ whom it may concern:

Be it known that I, GEORGE S. GALLAGHER, a citizen of the United States, residing at the city of New York, in the borough of Manhattan, county and State of New York, have invented an Improvement in Furnaces, of which the following is a specication.

My present invention relates Vparticularly to steam-boiler furnaces and to devices for facilitating the consumption of smokeI and gases for the production of perfect combustion, and the same is an improvementupon devices heretofore adopted and employed by lne.

In instances where wide fuel-beds are employed under large or double boilers it is dificult for the air forced over the fire to spread with uniformity over the entire fire area to render the combustion as perfect as possible;

and the object of my invention is to overcome this difficulty.

In carrying ont my invention and in combination with fines and injector-pipes in the side walls at each side of the fire-chamber and in the side walls back of the bridge-wall and also in the front wall I employ one or more intermediate walls dividing up the fire or grate area, the said intermediate wall being parallel with the side walls and between the bridge and front walls with a iiue longitudinally through such wall and injector-pipes in opposite sides of the wall connecting the flue and the combustion-chamber. I also divide the exit of the products of combustion passing above the bridge-wall by building up the center of the bridge-wall to the under side of the boiler and place therein iiues and openings therefrom to the 'passage ways thus formed between the side walls and said extension of the bridge-wall, and I prefer t0 build this extension of the bridge-wall of tapering form*that is to say, narrower at the side next to the fire-chamber and wider at the distant sideso that the passage-ways are contractedin the direction of movement of the products of combustion passing. over the bridge-wall. In this manner any smoke or gases unconsumed in the combustion-chamber by the surplus of air have an additional quantity of air imparted in the passage-ways over the bridge-wall and back of the same with the view of making the combustion complete.

In the drawings, Figure -l is a sectional plan representing my invention. Fig. 2 is a cross-section at 0c a: of Fig. 1, and Fig. 3 a longitudinal section at y y of Fig. 1.

The side walls a o. and front wall b are of usual character, and the bridge-wall c extends transversely of the furnace between the side walls, and d d represent grate-bars, and c e the ash-pits. The side walls a a are made with flues f g, extending from the front wall to back of the bridge-wall. The front wall is made with a flue h, connecting the forward ends of the flues f and g.

The bridge-,wall c is made with a flue fi, passing longitudinally within the same, and above the bridge-wall and extending therefrom to the under side of the boiler is the bridge-wall extension c', preferably of tapering form in the sectional plan Fig. l-that is, the portion of the bridge-wall extension next to the gratebars and combustion-chamber is narrower than the rear face at the back of the bridgewall. In this way the passage-way over the bridge-wall and between the said extension and the side walls is narrowed in the direction of travel of the products of combustion, the contracted portion of said passage-way being at the rear edge of the bridge-Wall.

In the bridge-wall extension c there are one or more fines t", that connect with the iiue z' in the bridge-wall. Between the grate-bars and extending from the bridge-wall to the front wall I employ one'or more center walls Z, dividing the ash-pit, grates, and fire-chamber into substantially equal portions. In the drawings I have shown one center wall, with a iiuem extending longitudinally through the wall and connecting with the flue o' in the bridge-wall c.

I provide injector-nozzles 3 in the form of pipe-sections built into the side and front walls, the bridge-wall, the bridge-wall extension, and the center wall Z, and which connect the flues in said parts with the combustionchamber. k represents the main air-pipe, preferably placed on top and along a central Wall n back of the bridge-Wall. The main air-pipe is preferably divided into three branches 7c 7927113, the central branch lo' extending to the ilues 'L' t" and m in the bridge- Wall, the bridge-Wall extension, and the center wall. The branch 7a2 extends to the right and the branch 7c3 to the left from the main pipe k, said branches k2 7c3 passing to the side walls and opening into the flues f and g.

The main air-pipe 7a is exposed and upon the central wall fn, for the purpose of raising the temperature of the air moving through the pipe by the passing hot products of combustion, so that the air is highly heated before passinginto the various flues in the walls of the furnace and passing from said iues through the injector-nozzles into the firechalnber to commingle with the smoke and the gases to cause a perfect combustion in the fire-chamber and prevent the loss of the units of heat, so that thesame may be as fully utilized as possible.

I do not herein limit myself to the tapering form in section of the bridge-wall extension and the consequent narrowing of the passage-Ways between said extension and the side walls of the furnace, although I prefer to construct the parts in this manner, because the action is to retard the movement from the fire-chamber over the bridge-wall of the products of combustion and smoke, their,

sudden escape being prevented and the opportunity being present thereby to inject an abundance of air, which commingles therewith for the purpose of completing the combustion.

In my improvement should anysmoke and unconsumed gases move rearward of the combustion-chamber over and back of the bridge-wall provision is made for forcing into the same air through the nozzles projecting from the lues i in the bridge-wall extension and from the rear ends of the iiues f and g in the side walls, with the object of preventing anysmoke or unconsumed gases passing away from beneath the boiler and finally escaping unconsumed.

I claim as my invention- 1. The combination in a furnace adapted for the consumption of smoke and gases, with the side and front walls and the bridge-wall having iues and injector-nozzles connecting said flues with the combustion-chamber, of a center Wall extending from the bridge-wall forward to the front Wall, a bridge-wall extension extending centrally from the top of the bridge-wall up to the under side of the boiler, said central wall and bridge-wall extension having flues therein and injector-'nozzles connecting the ues with the combustion-chamber and the passage-way between the side walls and the bridge-wall extension and rearward of the bridge-wall, and means substantially as shown and described, for supplying air under pressure to the said iues to be passed through the in jector-nozzles into the combustion-chamber, substantially as and for the purposes set forth.

2. The combination in a furnace adapted for the consumption of smoke and gases, with the side and front walls, and the bridge-wall having iues and injector-nozzles connecting said fines with the combustion-chamber, of one or more walls extending from the bridgewall to the front wall and intermediate to the side walls, an extension of the bridge-wall therefrom up to the boiler, said central or intermediate wall and the bridge-wall extension having flues and injector-nozzles connecting the same to the combustion-chamber, the bridge-wall extension being of tapering form narrowest next to the combustion-chamber along the front edge of the bridge-wall and widest along the rear edge of the bridge-wall distant from the combustionchamber and in effect narrowing the passage-ways between the same and the side walls of the furnace, a main air-pipe, a wall along which the main air-'pipe is supported exposed, branches from the main pipe to the said lines, whereby air under pressure is forced through the lines and the injector-nozzles into the combustion-chamber to commingle with the smoke and gases to form a perfect combustion,- substantially as set forth. I

3. The combination in a furnace adapted for the consumption of smoke and gases with the main side and front walls and the bridgewall extending between the same and having' ilues and injector-nozzles connecting said fines with the combustion-chamber which they surround, of a center wall of similar character to the main and bridge walls and extending from the bridge-wall forward to the front wall and dividing both the firechamber and ash-pit and having a line longitudinally of the same opening from and agreeing substantially in height with the flue of the bridge-wall, and injector-nozzles in the center wall connecting the iue therein with the portions of the divided combustionchamber on each side of said center wall, substantially as and for the purposes set forth.

4t. The combination in a furnace adapted for the consumption of smoke and gases with the side and front walls and the bridge-wall having iiues and `injector-nozzles and connecting said ues with the combustion-chamber which they surround, of a bridge-wall extension extending centrally from the top of the bridge-wall up to the under side of the boiler, the said bridge-wall extension being of tapering form narrowestnext to the combustion-chamber along the front edge of the bridge-wall and widest along the rear edge of the bridge-wall distant from the combustion-chamber and in effect narrowing the passage-ways between the same and the side Walls of the furnace, the said bridge-wail eX- tension having ues therein and injector- Ilozzles connecting the ues upon the opposite tapering sides of the said extension with the combustion-chamber and the passage-v Ways between the side Walls and the bridge- Wall extension, substantially as and for the purposes set forth. 1o

Signed by me this 16th day of January,

GEORGE S. GALLAGHER. Witnesses:

GEO. T. PINCKNEY, S. T. I-IAVILAND. 

